466 VEGETABLE 
Medullary rays, influence of, on 
transpiration current, 87 ; as store- 
houses of reserve material, 231 
Megaspores, 438 
Melampyrum, 209 
Melibiase, 256 
Melizitase, 256 
Mesocar pec, 431 
Mesocarpus, 365, 371 
Metabolism, 6, 129, 264 
Metapectic acid, 47 
Metapectine, 47 
Meta-proteins, 168 
Methane, 174 
Micelle of cell-wall, 48 
Microbes, 307 
Micrococcus Uree, 261 
Microsomata, 269 
Microspores, 438 
Middle lamella, 51 
Mimosa, 67, 363, 365, 377, 379, 393, 
397 
Mimulus, 392 
Mistletoe, 205, 350 
Mitosis, 422 
Miyosui on chemotaxis, 402 
Monoblepharis, 433 
‘Moneecious plants, 452 
Monotropa, 204 
Moorland plants, 345 
Movements, of protoplasm, 6, 357 ; 
for capture, 197, 199; in multi- 
cellular organs, 358 
Mucilage, 56, 240 
Mucor, 459 
Mvxurzin Brown and FRencH on 
formaldehyde, 157 
Mycoderma aceti, 262 
Mycorhiza, 204 
Myriophyllum, 123 
Myronate of potash, see Sinigrin 
Myrosin, 254, 259 
Myxomycetes, 10, 354, 400, 401, 402 
Nance, theory of composition of 
cell-wall, 48 
Nectar, 278 
Nectary, 68, 450 
Negative pressure, in wood-vessels, 
94, 97; influence of, on move- 
ments of gases, 122 
Neottia, 191 
Nepenthes, 196, 253 
Nervous mechanisms, 406 
Nickel, 181 
Nicotiana, 380 
PHYSIOLOGY 
Nitella, 6, 358 
Nitrates, 135, 171 
Nitrification, 139, 163 
Nitrogen, absorption of, 120, 139; 
in proteins, 166; fixation of, by 
leguminous plants, 140, 170, 203, 
by Alga, 171 
Nostoc, 12, 201 
Nuclear spindle, 269, 422 
Nuclein, 8, 180, 182 
Nucleolus, 8 
Nucleoplasm, 8 
Nucleus, 5; position in cell, 7; 
structure of, 8; definitive, 442; 
generative, 446 
Nutation, 321 
Nyctitropic movements, 331, 380, 
382 
Nymphea, 115, 339 
Ocelli, 410 
Gidogonium, 436 
Oil, see Fat, 
Oncidium, 245 
Oogonia, 432 
Oospheres, 432 
Oospore, 434 
Optically active compounds, 158 
Opuntia, 298, 302 
Ornithogalum, 245 
Orobanchacee, 350 
Orobanche, 208 
Osmosis, 60 ; in adult cells, 65 ; from 
veins of leaf, 79, 105; influence 
of, on transpiration current, 106, 
108 
Osmotic pressure, 61 
Ouvirandra, 339 
Ovule, 440 
Oxalic acid, 302 
Oxalidacece, 379 
Oxalis acetosella, 370 
Oxidases, 261, 265, 305 
Oxidation, 305 
Oxygen, mode of absorption by 
plants, 15, 35, 120; influence of, 
on action of roots, 90; proof of 
absorption of, 292; relation of 
absorption of, to exhalation of 
carbon dioxide, 297; variation in 
amount of, as affecting respiration, 
306 
Peonia, 45. 
Pangium, 173 
Papain, 258 
